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Question (21)

QN0029153

A substance has mass 72 g and volume 90 cm³. Calculate its density.

(A) 0.6 g/cm³
(B) 0.8 g/cm³
(C) 1.2 g/cm³
(D) 1.8 g/cm³

Correct Answer: B

Explanation:

Density = 72 ÷ 90 = 0.8 g/cm³.

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Question (22)

QN0029154

Which of the following has the highest density?

(A) 100 g in 200 cm³
(B) 150 g in 300 cm³
(C) 240 g in 200 cm³
(D) 180 g in 300 cm³

Correct Answer: C

Explanation:

Density = 240 ÷ 200 = 1.2 g/cm³.

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Question (23)

QN0029155

An object with density 0.95 g/cm³ is placed in water. It will:

(A) float
(B) sink rapidly
(C) evaporate
(D) break apart

Correct Answer: A

Explanation:

Density is less than 1.0 g/cm³.

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Question (24)

QN0029156

A material occupies 50 cm³ and has mass 75 g. Its density is:

(A) 0.5 g/cm³
(B) 1.0 g/cm³
(C) 1.5 g/cm³
(D) 2.5 g/cm³

Correct Answer: C

Explanation:

Density = 75 ÷ 50 = 1.5 g/cm³.

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Question (25)

QN0029157

Which density value corresponds to an object that would remain suspended in water?

(A) 0.5 g/cm³
(B) 0.8 g/cm³
(C) 1.0 g/cm³
(D) 1.5 g/cm³

Correct Answer: C

Explanation:

Equal density results in suspension.

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Question (26)

QN0029158

A solid has mass 270 g and density 0.9 g/cm³. What is its volume?

(A) 200 cm³
(B) 250 cm³
(C) 300 cm³
(D) 350 cm³

Correct Answer: C

Explanation:

Volume = 270 ÷ 0.9 = 300 cm³.

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Question (27)

QN0029159

Which pair of quantities is used to calculate density?

(A) Mass and weight
(B) Volume and area
(C) Mass and volume
(D) Area and height

Correct Answer: C

Explanation:

Density = Mass ÷ Volume.

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Question (28)

QN0029160

A block has density 1.8 g/cm³. Compared to water, it is:

(A) less dense
(B) equally dense
(C) more dense
(D) density cannot be compared

Correct Answer: C

Explanation:

1.8 g/cm³ is greater than water's density.

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Question (29)

QN0029161

An object has mass 400 g and density 0.8 g/cm³. Its volume is:

(A) 200 cm³
(B) 400 cm³
(C) 500 cm³
(D) 600 cm³

Correct Answer: C

Explanation:

Volume = 400 ÷ 0.8 = 500 cm³.

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Question (30)

QN0029162

Which object would float highest in water?

(A) Density 0.95 g/cm³
(B) Density 0.80 g/cm³
(C) Density 0.60 g/cm³
(D) Density 1.00 g/cm³

Correct Answer: C

Explanation:

Lower density means greater floating.

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Question (21)

A substance has mass 72 g and volume 90 cm³. Calculate its density.

Explanation:

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Question (22)

Which of the following has the highest density?

Explanation:

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Question (23)

An object with density 0.95 g/cm³ is placed in water. It will:

Explanation:

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Question (24)

A material occupies 50 cm³ and has mass 75 g. Its density is:

Explanation:

Link:

Question (25)

Which density value corresponds to an object that would remain suspended in water?

Explanation:

Link:

Question (26)

A solid has mass 270 g and density 0.9 g/cm³. What is its volume?

Explanation:

Link:

Question (27)

Which pair of quantities is used to calculate density?

Explanation:

Link:

Question (28)

A block has density 1.8 g/cm³. Compared to water, it is:

Explanation:

Link:

Question (29)

An object has mass 400 g and density 0.8 g/cm³. Its volume is:

Explanation:

Link:

Question (30)

Which object would float highest in water?

Explanation:

Link:

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